Self-closing cock with check.



P. MUELLER & A. C. SCHUERMANN.

SELF CLOSING COCK WITH CHECK.

APPLICATiON FILED MAY22, I916- Patented June 5, 1917.

PHHIIP MUELLER. AND ANTON C. SGHUERMANN, 0F DECATUR, ILLINOIS.

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eases.

Specification of Letters Eatent.

Patented June 5, rear.

Application filed may 22, 1916. Serial No. 99,162.

ing cocks of that type in which the valve is normally held seated against pressure by means of a spring, the opening of the valve being accomplished by means of a suitable handle which when rotated will elevate the valve from its seat, compress the spring and permit the flow of water so long which, immediately upon release of the as the valve is held in open position, but, 1n

handle, the valve is automatically seated by the spring and the flow cut off.

The present invention has for its purpose to provide an effective check or stop for valves of this character which will guard against an excessive rotation of the handle and corresponding excessive movements of the cooperating parts, for it not infrequently happens that careless users in operating valves of this type will throw the handle to its full capacity and subject the parts to strain, sometimes, in the case of'badly ad: justed valves overthrowing the handle and causing an unnecessary wear and strain upon the operating elements.

Broadly considered, checks or stops for valves are old, but the particular adaptation which we have made forthis type of valve presents certain features which are of value in that by our construction the stops or checks are applied without any material change in the general make-up of-the valve and they do not involve any complicated or expensive parts, and, furthermore,

the valve may be assembled as quickly and readily as in the ordinary style where the stops are absent.

In the drawings herewith, we have shown one embodiment of our invention and in said drawings,

Figure 1 is a sectional view, on a vertical plane of the well-known Mueller type of self-closing cock with our invention applied thereto.

Fig. 2 is a plan view of the gland nut or cap showing the stop elements thereon.

Fig. 3 is a bottom plan view of the operating handle showing the stop elements which cooperate with the stop elements the gland nut.

Fig. 4 is a top plan view on substantially the line 4-4, looking in the direction of the arrow. I

Referring to the drawings by numbers, like numbers indicating like parts in the several views, 10 designates the body'of the cock provided with a valve seat 11 controlled by a valve 12 from which rises a stem 13 passing through the valve casing 14, the said valve 12 being normally held to its seat by a spring 15'which bears at its lower end'upon the valve 12, and at its upper end engages an abutment 16 which is held in place by the gland nut 17, through which the stem 13 of the valve passes. The gland nut 17 is provided on its upper surface with a spiral cam track 18 upon which rest the lifting rollers 19, preferably three in number, mounted on the arms of a suitable spider or yoke which encircles thestem 13. Secured to the upper end of the stem 13 is a handle 20 which is locked thereto in any suitable manner, as, for example, by means of the lock nuts 21, (see Fig. 1)

handle 20 is recessed as shown, so as to provide a depending skirt which houses the housed within the index cap 22. The said rollers and the upper end of the gland nut,

and the bottom wall of said recess has an opposed cam or spiral track 23, the track 23 and the track 18 on the gland nut being formed right and left with respect to each other, so that when the handle 20 is rotated the intervening rollers 19 will cause'the handle 20, the stem 13 and the valve 12 to lift against the pressure of the spring 15 and open the port in the valve seat 20. v

In order to check the rotation or angular movement of the handle so as to limit' it to such movement as will open the valve 12 sufficiently to give the proper flow, we provide the gland nut 17 with one or more stops 24 which may be, and preferably are, cast integral therewith, these stops, as shown in Figs. 2 and 4, being of considerable length fora purpose which will presently appear.

Cotiperating with the said stops 24 on the gland-nut 17 is a stop or stops 25 formed on the skirt of the handle 20 at or near the lower edge thereof and projecting inwatdly so that, as shown in Fig. 1, they lie in a plane below the stops 24.which project the outer wall of the gland-nut.

' In closed position of the valve, the stops.

' will occupy substantially the position shown in Fig. 4 just to one side of the stops 24 on the gland-nut. As the handle 20 is rotated the stops 25 will turn beneath the stops 24 and as the elevated rollers or cam tracks lift the handle 20, its attached stem and valve, the stops 25 will come in contact with the undersurface of the stops 24 and effectively check further rotation of the valve by reason of the increasing frictional engagement of the stops 25 and 24.

The construction is one which gives a very efl'ective'and yet a smooth stopping action of the handle as the stops gradually engage and are then brought into close frictional contact.

It will be seen that by this arrangement,

and without altering to any material degree the standardized construction of valves of this type, a very eflicient check or stop against careless and immoderate use of the valve is provided, and while we have shown it in connection with a particular construction of self-closing valve, it will be understood that the valve construction may be con siderably varied without departing from the spirit of our invention, and we do not limitmovable relative to each other, so as to bring their upper and lower surfaces into frictional contact when said handle is rotated to limit the rotation of said handle and. lift of said valve.

2. In a self-closin valve, the combination of a body portion liaving'a valve seat, a valve having a stem, means tending to close said valve, an operating handle on. said stem having a depending skirt to house the upper part of the valve body and the operating parts between said handle and body portion, means between said handle and body portion to lift said valve and stem when said handle is rotated, stop means on said body portion,-and stop means on the skirt of said handle, said stop) means being angularly and vertically mova le relative to each other so handle is rotated parts between said handle and body por' tion, means between said handle and body portion to lift said valve and stem when said handle is rotated, radially projecting stop means on the exterior of said body portion and radially projecting. stop means on the interior of the skirt of said handle, said stop means being angularly and vertically movable relative to each other so as to bring theiropposed upper and-lower surfaces into frictional contact when said handle is rotated to limit the rotation of said handle and lift of said valve.

4. In a self-closing valve, the combination of a body portion having a valve seat, a valve having a stem, means tending to close said valve, an operating. handle on said stem, means between said handle and body portion to lift said valve and stem when said handle is rotated, stops on said body portion, and stops, on said handle, one of said sets of stops having an extended area and being offset from the other set of stops, so that upon relative angular and vertical movement of said stops their opposed upper.

and lower surfaces are brought into frictional contact to limit the rotation of said handle and lift of said valve.

5. In a valve, the combination of a body portion having a valve seat, a valve having a stem, an operating handle on said stem, a stop on said body portion, a stop on saidhandle, one of said stops having an extended area, said stops being angularly and vertically movable relative to each other, so as to bring their opposed'upperand lowersurfaces into frictional contact when said I to limit the rotation of said handle and lift of said valve.

In testimony whereof we have hereunto set our hands in presence of two subscribing witnesses.

PHHJIP MUELLER. 'ANTON G. SCHUERMANN. Witnesses:

- J. W. WELLS,

FRED R. Pnnenrs; 

